Answer to Question #143713 in General Chemistry for jake

Question

Propane reacts with oxygen to make carbon dioxide and water. If 150g of propane and 150g of oxygen produces 160g of CO2 and water, how many kilograms of propane and oxygen must be used to produce 1 kilogram of water?

Answer 1

C₃H₈+ 5O₂$\rightarrow$ 3CO₂ + 4H₂O

according to stoichiometry...

1 mole of propane reacts with 5 moles of oxygen to produce 3 moles of CO₂ and 4 moles of water.

moles of water = 1000/18 = 55.55moles

moles of propane required = 55.55/4 = 13.89 moles

mass of propane required = 13.89$\times$ 44 = 611.66 grams

moles of oxygen required = 55.55$\times4$ /5 = 44.44 moles

mass of oxygen required = 44.44$\times$ 32 = 1422.08 grams